                    &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         &\multicolumn{1}{c}{(6)}         &\multicolumn{1}{c}{(7)}         \\
\hline
ln(other cost) - ln(hp cost)&       0.396\sym{***}&                     &                     &                     &                     &                     &       0.326\sym{***}\\
                    &     (0.045)         &                     &                     &                     &                     &                     &     (0.076)         \\
[1em]
\$30-59k             &                     &      -0.014         &                     &                     &                     &                     &      -0.025         \\
                    &                     &     (0.045)         &                     &                     &                     &                     &     (0.043)         \\
[1em]
\$60-99k             &                     &      -0.060         &                     &                     &                     &                     &      -0.075         \\
                    &                     &     (0.042)         &                     &                     &                     &                     &     (0.041)         \\
[1em]
\$100k+              &                     &      -0.054         &                     &                     &                     &                     &      -0.050         \\
                    &                     &     (0.039)         &                     &                     &                     &                     &     (0.040)         \\
[1em]
Black               &                     &                     &       0.036         &                     &                     &                     &      -0.006         \\
                    &                     &                     &     (0.045)         &                     &                     &                     &     (0.046)         \\
[1em]
Nat.Am.             &                     &                     &      -0.208\sym{***}&                     &                     &                     &      -0.231\sym{***}\\
                    &                     &                     &     (0.024)         &                     &                     &                     &     (0.047)         \\
[1em]
Asian               &                     &                     &      -0.049         &                     &                     &                     &      -0.006         \\
                    &                     &                     &     (0.047)         &                     &                     &                     &     (0.046)         \\
[1em]
Other               &                     &                     &      -0.101         &                     &                     &                     &      -0.081         \\
                    &                     &                     &     (0.060)         &                     &                     &                     &     (0.059)         \\
[1em]
Owner               &                     &                     &                     &       0.011         &                     &                     &      -0.026         \\
                    &                     &                     &                     &     (0.026)         &                     &                     &     (0.028)         \\
[1em]
Rural               &                     &                     &                     &                     &       0.084\sym{**} &                     &       0.073\sym{**} \\
                    &                     &                     &                     &                     &     (0.027)         &                     &     (0.027)         \\
[1em]
Northeast           &                     &                     &                     &                     &                     &      -0.003         &       0.002         \\
                    &                     &                     &                     &                     &                     &     (0.035)         &     (0.035)         \\
[1em]
South               &                     &                     &                     &                     &                     &       0.198\sym{***}&       0.056         \\
                    &                     &                     &                     &                     &                     &     (0.030)         &     (0.048)         \\
[1em]
West                &                     &                     &                     &                     &                     &      -0.021         &      -0.109\sym{**} \\
                    &                     &                     &                     &                     &                     &     (0.029)         &     (0.040)         \\
\hline
Observations        &        1670         &        1670         &        1670         &        1670         &        1670         &        1670         &        1670         \\
